A device and method for detecting leakage of liquid pressure pipes in power plant boilers

Abstract

The present invention discloses a device and method for detecting leaks in a liquid pressure pipeline of a power plant boiler. The device comprises a first connecting pipe, a second connecting pipe, a main tee, and a side tee. A main pipeline is fixedly connected between the middle portions of the first and second connecting pipes, and side pipelines are connected between the two side ends of the first and second connecting pipes. The main tee is fixedly mounted in the middle portion of the main pipeline, and the side tees are fixedly mounted in the middle portions of the two side pipelines. A flow rate meter is mounted on each of the main and side tees, a pressure meter is mounted on the first connecting pipe, and a flow meter is mounted on the second connecting pipe. The device can detect pipeline leaks and obtain the leakage amount simultaneously.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline leakage detection, and relates to a device and method for detecting leakage of a liquid pressure pipeline of a boiler in a power plant. Background Art

[0002] When power plant boilers are in use, they require various pipes to transport water, steam, flue gas, and various other fluids. Generally, power plants install leak detection devices on liquid pressure pipes. However, most common leak detection devices confirm whether the pipe is leaking based on changes in pressure or flow. This detection method cannot accurately measure the amount of leakage. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a device and method for detecting leakage of a liquid pressure pipeline of a power plant boiler, which can obtain the leakage amount while detecting pipeline leakage.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A leakage detection device for a liquid pressure pipe of a power plant boiler comprises a first connecting pipe, a second connecting pipe, a main tee and a side tee;

[0006] A main pipeline is fixedly connected between the middle parts of the first connecting pipe and the second connecting pipe, and side pipelines are connected between the two side ends of the first connecting pipe and the second connecting pipe; the main tee is fixedly installed in the middle part of the main pipeline, and the side tee is fixedly installed in the middle parts of the two side pipelines. Flow rate meters are installed on the main tee and the side tees, a pressure detection gauge is installed on the first connecting pipe, and a flow detection gauge is installed on the second connecting pipe.

[0007] Preferably, both ends of the first connecting pipe are connected to the side pipe using a first side valve, and one side of the first connecting pipe is connected to the main pipe using a first main valve; both ends of the second connecting pipe are connected to the side pipe using a second side valve, and one side of the second connecting pipe is connected to the main pipe using a second main valve.

[0008] Furthermore, the main pipeline is connected to the first main valve and the second main valve by using a first flange.

[0009] Furthermore, the side pipeline is connected to the first side valve and the second side valve by using a second flange.

[0010] Preferably, a first inner cavity is opened inside the main tee and the side tee, and the flow meter is located inside the first inner cavity and is provided with a speed measuring impeller.

[0011] Preferably, a second inner cavity is opened inside the first connecting tube, and the pressure detection gauge is located inside the second inner cavity and is provided with a pressure detection end.

[0012] Preferably, a third inner cavity is opened inside the second connecting tube, and the flow detection meter is located inside the third inner cavity and is provided with a flow detection end.

[0013] Preferably, an end of the first connecting pipe away from the main pipeline is connected to a liquid inlet pipe, and a liquid inlet valve is provided inside the liquid inlet pipe.

[0014] Preferably, an end of the second connecting pipe away from the main pipeline is connected to a liquid outlet pipe, and a liquid outlet valve is provided inside the liquid outlet pipe.

[0015] A method for detecting leakage in a liquid pressure pipe of a power plant boiler based on any one of the above-mentioned devices comprises the following steps:

[0016] When a leak occurs in the liquid pressure pipeline of a power plant boiler, the liquid pressure will first decrease, and the flow rate will also decrease. The pressure detection gauge on the first connecting pipe detects the real-time pressure, the flow detection gauge on the second connecting pipe detects the real-time flow, and the flow rate gauges on the main tee and side tee detect the change in liquid flow rate in real time. The leakage amount is determined based on the difference between the real-time flow rate and the normal flow rate, as well as the difference between the real-time liquid flow rate and the normal liquid flow rate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention sets a main pipeline and a side pipeline, and installs a main tee and a side tee in the middle of the main pipeline and the side pipeline. The interior of the main tee and the side tee respectively detects and displays the change of liquid flow rate in real time through a flow meter. By setting a pressure detection meter and a flow detection meter, when a leak occurs in the liquid pressure pipeline of the power plant boiler, the pressure value change is detected by the pressure detection meter and then displayed, and the flow value change is detected by the flow detection meter and then displayed synchronously, so that it can be confirmed whether the pipeline is leaking by detecting the changes in liquid flow and liquid pressure in the pipeline. The device is used in conjunction with the flow meter, the pressure detection meter and the flow detection meter. The three synchronously detect different data of the liquid in the pipeline, thereby improving the detection accuracy and judging the leakage amount.

[0019] Furthermore, the present invention provides a first main valve, a second main valve, a first side valve and a second side valve, and the main pipeline is connected to the first main valve and the second main valve by a first flange. In this way, when the main pipeline needs to be repaired, the main pipeline can be easily installed and removed, and the side pipeline is connected to the first side valve and the second side valve by a second flange. In this way, when the side pipeline needs to be repaired, the side pipeline can be easily installed and removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2It is a schematic diagram of the internal structure of the overall structure of the present invention;

[0022] Figure 3 For the present invention Figure 1 An enlarged schematic diagram of point A in FIG.

[0023] Figure 4 For the present invention Figure 2 An enlarged schematic diagram of point B in FIG.

[0024] Figure 5 For the present invention Figure 2 Enlarged schematic diagram of point C in FIG.

[0025] Among them: 1. First connecting pipe; 2. Second connecting pipe; 3. Main pipeline; 4. Side pipeline; 5. Main tee; 6. Side tee; 7. Flow meter; 8. First inner cavity; 9. Velocity measuring impeller; 10. Pressure test gauge; 11. First side valve; 12. First main valve; 13. Flow meter; 14. Second side valve; 15. Second main valve; 16. Second inner cavity; 17. Pressure detection end; 18. Third inner cavity; 19. Flow detection end; 20. Liquid inlet pipe; 21. Liquid inlet valve; 22. Liquid outlet pipe; 23. Liquid outlet valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figure 1 1 is a diagram showing a leakage detection device for a liquid pressure pipeline of a power plant boiler according to the present invention, comprising a first connecting pipe 1 , a second connecting pipe 2 , a main tee 5 , a side tee 6 and a first inner cavity 8 .

[0030] A main pipeline 3 is fixedly connected between the middle parts of the first communicating pipe 1 and the second communicating pipe 2 , and a side pipeline 4 is fixedly installed between both ends of the first communicating pipe 1 and the second communicating pipe 2 .

[0031] The main tee 5 is fixedly installed in the middle of the main pipe 3, and the side tee 6 is fixedly installed in the middle of the two side pipes 4. Flow rate meters 7 are fixedly installed on the top ends of the main tee 5 and the side tees 6.

[0032] The first inner cavity 8 is respectively opened inside the main tee 5 and the side tee 6. Figure 4 As shown, the flow meter 7 is located inside the first inner cavity 8 and is provided with a velocity measuring impeller 9. By arranging the main pipe 3 and the side pipe 4, the main tee 5 and the side tee 6 are installed in the middle of the main pipe 3 and the side pipe 4. The interiors of the main tee 5 and the side tee 6 respectively detect the changes in liquid flow rate in real time through the velocity measuring impeller 9 in the first inner cavity 8, and then display it in real time through the flow meter 7. This device uses the flow meter 7 in conjunction with the pressure detection meter 10 and the flow detection meter 13. The three can synchronously detect different data of the liquid in the pipeline, thereby improving the detection accuracy.

[0033] like Figure 2-3 As shown, in the present invention, a pressure detection gauge 10 is fixedly installed on the top of the first connecting pipe 1, a second inner cavity 16 is opened inside the first connecting pipe 1, and the pressure detection gauge 10 is located inside the second inner cavity 16 and is provided with a pressure detection end 17; both ends of the first connecting pipe 1 are connected to the side pipeline 4 through the first side valve 11, and one side of the first connecting pipe 1 is connected to the main pipeline 3 through the first main valve 12. By setting the pressure detection gauge 10, when the liquid pressure pipeline of the power plant boiler leaks, the pressure detection end 17 detects the pressure value change and displays it synchronously through the pressure detection gauge 10, so that it is possible to confirm whether the pipeline is leaking by detecting the change in the liquid pressure in the pipeline.

[0034] like Figure 5 As shown, in the present invention, a flow detection meter 13 is fixedly installed on the top of the second connecting pipe 2, a third inner cavity 18 is opened inside the second connecting pipe 2, and the flow detection meter 13 is located inside the third inner cavity 18 and is provided with a flow detection end 19; both ends of the second connecting pipe 2 are connected to the side pipeline 4 through the second side valve 14, and one side of the second connecting pipe 2 is connected to the main pipeline 3 through the second main valve 15. By setting the flow detection meter 13, when the liquid pressure pipeline of the power plant boiler leaks, the flow detection end 19 in the third inner cavity 18 inside the second connecting pipe 2 will detect the real-time flow. When the flow detection end 19 detects a change in the flow value, it will be synchronously displayed through the flow detection meter 13, so that it is possible to confirm whether the pipeline is leaking by detecting the change in the liquid flow in the pipeline.

[0035] In the present invention, a liquid inlet pipe 20 is fixedly installed at one end of the first connecting pipe 1 away from the main pipeline 3 , and a liquid inlet valve 21 is provided inside the liquid inlet pipe 20 .

[0036] In the present invention, a liquid outlet pipe 22 is fixedly installed at one end of the second connecting pipe 2 away from the main pipeline 3 , and a liquid outlet valve 23 is provided inside the liquid outlet pipe 22 .

[0037] In the present invention, the main pipeline 3 is connected to the first main valve 12 and the second main valve 15 through a first flange. By setting the first main valve 12 and the second main valve 15, the main pipeline 3 is connected to the first main valve 12 and the second main valve 15 through the first flange. In this way, when the main pipeline 3 needs to be repaired, the main pipeline 3 can be easily installed and disassembled.

[0038] In the present invention, the side pipe 4 is connected to the first side valve 11 and the second side valve 14 through the second flange. By setting the first side valve 11 and the second side valve 14, the side pipe 4 is connected to the first side valve 11 and the second side valve 14 through the second flange. In this way, when the side pipe 4 needs to be repaired, the side pipe 4 can be easily installed and disassembled.

[0039] The power plant boiler liquid pressure pipeline leakage detection method of the power plant boiler liquid pressure pipeline leakage detection device is as follows:

[0040] Step 1: First, connect the liquid inlet pipe 20 and the liquid outlet pipe 22 between the liquid pressure pipes of the power plant boiler, and then open the liquid inlet valve 21 and the liquid outlet valve 23.

[0041] Step 2: Open the first main valve 12 and the first side valves 11 at both ends of the first connecting pipe 1 , and then open the second main valve 15 and the second side valve 14 on the second connecting pipe 2 .

[0042] Step 3: When a leak occurs in the liquid pressure pipeline of the power plant boiler, the liquid pressure will first decrease, and the flow rate will also decrease. At this time, the pressure detection end 17 in the second inner cavity 16 inside the first connecting pipe 1 will detect the real-time pressure. When the pressure detection end 17 detects a change in the pressure value, it will be synchronously displayed through the pressure detection meter 10.

[0043] Step 4: Then the flow detection end 19 in the third inner cavity 18 inside the second connecting pipe 2 will detect the real-time flow rate. When the flow detection end 19 detects a change in the flow value, it will be synchronously displayed through the flow detection meter 13.

[0044] Step 5: At the same time, a main tee 5 and a side tee 6 are installed in the middle of the main pipe 3 and the side pipe 4. The interiors of the main tee 5 and the side tee 6 respectively detect the change of liquid flow rate in real time through the speed measuring impeller 9 in the first inner cavity 8, and then display it in real time through the flow meter 7.

[0045] Step 6: Determine the leakage amount based on the difference between the real-time flow rate and the normal flow rate, as well as the difference between the real-time liquid flow rate and the normal liquid flow rate.

[0046] Working principle: First, connect the liquid inlet pipe 20 and the liquid outlet pipe 22 between the liquid pressure pipeline of the power plant boiler, then open the liquid inlet valve 21 and the liquid outlet valve 23, then open the first main valve 12 on the first connecting pipe 1 and the first side valves 11 at both ends, and then open the second main valve 15 and the second side valve 14 on the second connecting pipe 2. When a leak occurs in the liquid pressure pipeline of the power plant boiler, the liquid pressure will first decrease, and the flow rate will also decrease. At this time, the pressure detection end 17 in the second inner cavity 16 inside the first connecting pipe 1 will detect the real-time pressure. When the pressure detection end 17 detects a change in the pressure value, it will be displayed synchronously through the pressure detection meter 10. Then, the flow detection end 19 in the third inner cavity 18 inside the second connecting pipe 2 will detect the real-time flow. When the flow detection end 19 detects a change in the flow value, it will be displayed synchronously through the flow detection meter 13. At the same time, the main tee 5 and the side tee 6 are installed in the middle of the main pipeline 3 and the side pipeline 4. The interiors of the main tee 5 and the side tee 6 respectively detect the change in liquid flow rate in real time through the speed measuring impeller 9 in the first inner cavity 8, and then display it in real time through the flow meter 7.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] It should be understood that the above description is for illustrative purposes only and is not intended to be limiting. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A method for detecting leakage of a liquid pressure pipe of a power plant boiler, characterized in that: The method is used for a power plant boiler liquid pressure pipeline leakage detection device, the power plant boiler liquid pressure pipeline leakage detection device comprising a first connecting pipe (1), a second connecting pipe (2), a main tee (5) and a side tee (6); A main pipe (3) is fixedly connected between the middle parts of the first connecting pipe (1) and the second connecting pipe (2), and side pipes (4) are connected between the two side ends of the first connecting pipe (1) and the second connecting pipe (2); a main tee (5) is fixedly installed in the middle part of the main pipe (3), and a side tee (6) is fixedly installed in the middle parts of the two side pipes (4); a flow meter (7) is installed on the main tee (5) and the side tee (6); a pressure detection meter (10) is installed on the first connecting pipe (1), and a flow detection meter (13) is installed on the second connecting pipe (2); A first inner cavity (8) is provided inside the main tee (5) and the side tee (6); a flow meter (7) is located inside the first inner cavity (8) and is provided with a velocity measuring impeller (9); The detection method includes the following process: When a leakage occurs in the liquid pressure pipe of a power plant boiler, the liquid pressure will first decrease, and at the same time, the flow rate will also decrease. The pressure detection gauge (10) on the first connecting pipe (1) detects the real-time pressure, the flow detection gauge (13) on the second connecting pipe (2) detects the real-time flow, and the flow rate gauges (7) on the main tee (5) and the side tee (6) detect the change in liquid flow rate in real time. The leakage amount is determined based on the difference between the real-time flow rate and the normal flow rate, and the difference between the real-time liquid flow rate and the normal liquid flow rate.

2. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 1, characterized in that: Both ends of the first connecting pipe (1) are connected to the side pipe (4) using a first side valve (11), and one side of the first connecting pipe (1) is connected to the main pipe (3) using a first main valve (12); both ends of the second connecting pipe (2) are connected to the side pipe (4) using a second side valve (14), and one side of the second connecting pipe (2) is connected to the main pipe (3) using a second main valve (15).

3. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 2, characterized in that: The main pipeline (3) is connected to the first main valve (12) and the second main valve (15) by a first flange.

4. The method for detecting leakage of a liquid pressure pipeline of a power plant boiler according to claim 2, characterized in that: The side pipe (4) is connected to the first side valve (11) and the second side valve (14) by a second flange.

5. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 1, characterized in that: A second inner cavity (16) is provided inside the first connecting tube (1), and a pressure detection gauge (10) is provided inside the second inner cavity (16) with a pressure detection end (17).

6. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 1, characterized in that: A third inner cavity (18) is provided inside the second connecting tube (2), and a flow detection meter (13) is provided inside the third inner cavity (18) with a flow detection end (19).

7. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 1, characterized in that: One end of the first connecting pipe (1) away from the main pipe (3) is connected to a liquid inlet pipe (20), and a liquid inlet valve (21) is provided inside the liquid inlet pipe (20).

8. The method for detecting leakage of liquid pressure pipes in power plant boilers according to claim 1, characterized in that: One end of the second connecting pipe (2) away from the main pipe (3) is connected to a liquid outlet pipe (22), and a liquid outlet valve (23) is provided inside the liquid outlet pipe (22).

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